687-64-9Relevant articles and documents
Synthesis of peptide dendrimers with polyhedral oligomeric silsesquioxane cores via click chemistry
Pu, Yu-Ji,Yuan, Hui,Yang, Ming,He, Bin,Gu, Zhong-Wei
, p. 917 - 920 (2013)
Inorganic polyhedral oligomeric silsesquioxane (POSS) was used as the core for the synthesis of poly(l-lysine) peptide dendrimer via copper-catalyzed azide-alkyne click chemistry. The inorganic/organic composite dendrimer was characterized by MS, 1/
Preparation method of amino-acid ester
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Paragraph 0010, (2019/03/15)
The invention relates to a preparation method of amino-acid ester, and belongs to the field of synthesis of organic compounds. The preparation method of the amino-acid ester comprises the following steps: taking sulfur trioxide as a catalyst and a water-binding agent, catalyzing amino acid and alcohol to react so as to prepare sulfate of the amino-acid ester, then concentrating a reaction system to remove a reaction solvent and then adding water for dissolving, and neutralizing ammonia water to prepare the amino-acid ester. According to the technical scheme, the provided preparation method ofthe amino-acid ester has the advantages of mild reaction process, high yield, good purity, simplicity in operation and low cost. Concentrated condensate water of central mother liquor of the preparation method of the amino-acid ester can be directly subjected to biochemical treatment, solid by-products are high-purity ammonium sulfate, and can serve as chemical fertilizers, a reaction process is green and pollution-free, and thus, environmental protection is facilitated.
Metalloporphyrin dimers bridged by a peptoid helix: Host-guest interaction and chiral recognition
Lee, Yen Jea,Kang, Boyeong,Seo, Jiwon
, (2018/11/03)
Co-facial porphyrins have been designed to construct porphyrin tweezers with versatile molecular recognition capabilities. In this study, we synthesized metalloporphyrin-peptoid conjugates (MPPCs) displaying two metalloporphyrins on a peptoid scaffold with either achiral unfolded (1) or helical (2 and 3) secondary structures. Host-guest complexation of MPPCs was realized with various guests of different lengths and basicities, and the extent of complexation was measured by UV-vis and circular dichroism (CD) spectroscopic titration. Intermolecular and intramolecular chirality induction were observed on achiral and chiral peptoid backbones, respectively. Spectroscopic data indicated that a broad scope of achiral guests can be recognized by chiral 2; in particular, longer and more flexible guests were seen to bind more tightly on 2. In addition, chiral 2 provided a distinct CD couplet with DL-, D-, or L-Lys-OMe, which was a result of the diastereomeric host-guest complex formation. Our results indicated that MPPCs can recognize, contrast, and analyze various achiral, chiral, or racemic molecules. Based on co-facial metalloporphyrins present on peptoid scaffolds, we developed a novel class of porphyrin tweezers, which can be further utilized in asymmetric catalysis, molecular sensing, and drug delivery.